设X1,X2是方程x²-xsin(π/5)-cos(π/5)=0的两根,则arctanx1+arctanx2的值是?
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设X1,X2是方程x²-xsin(π/5)-cos(π/5)=0的两根,则arctanx1+arctanx2的值是?设X1,X2是方程x²-xsin(π/5)-cos(π/5)=0
设X1,X2是方程x²-xsin(π/5)-cos(π/5)=0的两根,则arctanx1+arctanx2的值是?
设X1,X2是方程x²-xsin(π/5)-cos(π/5)=0的两根,则arctanx1+arctanx2的值是?
设X1,X2是方程x²-xsin(π/5)-cos(π/5)=0的两根,则arctanx1+arctanx2的值是?